schinke



Nov. 13, 1928.

E. C. SCHINKE CALCULATING MACHINE Filed Sept. 1, 1921 5 Sheets-Sheet 1 Nov. 13, 1928.

E. C. SCHINKE CALCULATING MACHINE Filed Sept. 1. 1 2.1 5 Sheets-Sheet 2 Nov. 13, 1928. 1,691,555 E. c. SCHINKE CALCULATING MACHINE Filed Sept. 1, 1921 5 Sheets-Sheet 3 lll Nov. 13, 1928.

E. C. SCHINKE CALCULATING MACHINE Filed Sept. 1. 1921 5 Sheets-Sheet 4 5 a. seam/re (9% WW Nov. 13, 1928. 1,691,555

E. C. SCHINKE CALCULATING MACHINE Filed Sept. 1. 1921 "5 Sheets-Sheet 5 4 if 4 F Patented Nov. 13, 1928.

UNITED STA COMPANY, OF ST. LOUIS, MISSOURI, A OORPORATIONOF MISSOURI.

GALCU ATING MACHINE.

Application filed September This invention relates to improvements in calculating machines, and to illustrate cer- 'tain features of the invention I have shown calculating mechanism adapted to be actutwo accumulators, viz, an individual accumulator wherein individual items are temporarily registered, and a grand accumulator adapted to indicate the total of all of the individual items, The individual items can I, be subtracted from the individual accumulator without in any way affecting the grand accumulator, and when necessary the grand total can be subtracted from the grand accumulator without affecting the individual accumulator.

Each accumulator is provided with an ac tuator and a traveling denominational carriage, movable step by step to change the denominational relation of the actuator to the accumulator, thereby. providing for the transmission of movement to a series of total wheels of different orders. The actuator just referred to may be a rotary master wheel, and it may be carried by the denominational carriage so as to advance one step in response to each operation of the numeral keys. In the structure I have shown, the denominational carriage is driven by thetraveling platen carriage of an ordinary typeaccumulator and an individual denomina tional carriage for each accumulator. The old mechanisms of which I am aware include a separate traveling carriage for each accumulator and complex selecting devices whereby any one of the traveling carriages canbe selected and shifted while the other carriages are retained in their starting positions, or home positions. One of my objects is to entirely eliminate the selective means for causing one denominational carriage to travel independently of another.

Briefly stated, the preferred form of the invention comprises two accumulators each provided with an actuator in the form of a master wheel, and a denominational carriage movable step by step to simultaneously 1, 1921. Seria1No.497,79 1.

.the master wheels in successive operative .po-

sitions relative to its accumulator, while the other master wheel 1s located in successive idle positions relat ve to its accumulator.

In either case the denominational carriage simultaneously locates both master wheels in different positions relative to the accumulators, so it is not necessary -to employ more than one denominational carriage and it is not necessary to provide mechanism for causing onedenominational carriage to travel independently of another.

This may be accomplished by causing one of'th'e master wheels to occupy idle positions between denominational wheels of its accumulator, while the othermaster wheel occupies active positions in mesh with the wheels of its accumulator. By means of an extremely simple selectingdevice, both master wheels can be located in their 0 erative positions to simultaneously actuate oth accumulators. As an illustration of this feature of the invention, I have shown a thin master wheel adapted to idly rotate between the denominational wheels of its accumulator, and a thiokermaster wheel adapted to mesh with the denominational wheels of the other accumulator when the thin master wheel occupies idle positions between its denominational wheels and also when said thin master wheel is in mesh with its denominational' wheels. The means for actuating the traveling denominational carriage includes a selector which locates both master wheels in mesh with their denominational wheels and another selector which locates the thin master .wheel, in its idle positions while the thick master wheel occupies its operative positions.

Another object is to produce an extremely simple means for preventing operation of the calculating mechanism when the denominational carriage is not properly positioned for operation of an accumulator. A further object is to prevent displacement 'ofthe denominational carriage during the operations of the calculating mechanism. Both of these IOU I 1,691,555 TES PATENT OFFICE;

EDWARD o. scnmxn, on ST. LOUIS, MISSOURI, ASSIGNOR 'to THE nccoun'roeimrn ill objectsmay be accomplished through the medium of a single locking device actuated by the numeral keys to lock the carriage and actuated by the carriage to lock the numeral keys, as will be hereafter described.

\Vith the foregoing and other objects in View, the invention comprises the novel construction, combination and arrangement of parts hereinafter more specifically described and illustrated in the accompanying drawings wherein is shown the preferred embodiment of the invention. However, it is to be understood that the invention comprehends changes, variations and modifications which come within the scope of the claims hereunto appended. i

Fig. I is a side elevation, partly in section, showing a typewriting machine provided with calculating mechanism embodying the features of this invention.

Fig. II is a detail view of the means for looking a master wheel.

Fig. III is a top or plan,view of the calculating mechanism, some of the parts being shown in section.

Fig. IV isa fragmentary detail view of the reversing device associated with the master wheel shaft to provide for addition and subtraction.

Fig. V is a. rear elevation of the combined typewriter and calculating machine.

Fig. VI is a detail view showing certain elements through which motion is transmitted from the platen carriage of the typewriter to the master wheel carriage.

Fig. VII is a vertical section showing one of the pivotally supported fingers through which motion is transmitted from the platen carriage. i

Fig. VIII is a fragmentary rear elevation of the platen carriage and the devices located adjacent theretoto transmit motion t0,,the master wheel carriage.

Fig. IX is a detail view of the ratchet device on the integer wheel shaft.

Fig. X is a front elevation of the parts shown in Fig. IX.

Fig. XI is an enlarged fragmentary top View showing the accumulators and some of the devices for actuating and locking the master Wheel carriage.

Fig. XII is a side elevation, partly in section, showing the means for locking the numeral keys and master wheel carriage.

Fig. XIII is a view similar to Fig. XII showing the parts in different positions.

Fig. XIV is a side elevat on, partly in section, showing the means for locking the integer wheel shaft. I

Fig. XV is a view similar to Fi XIV showing the parts in different positions.-

Fig. XVI is a fragmentary top View showing cam fingers through which motion is transmitted to a tilting bar.

Briefly stated, the machine about to be described is a calculating attachment for typewriters, and it is adapted for use with ordinary typewriting machines now on the market. The numbers to be, added are written by the typewriter and the total is indicated by an accumulator, or by a plurality of accumulators. Each of the accumulators herein shown comprises a series of denominathe medium of the numeral keys of the type-' writer.

The accumulators.

I do not deem it necessary to point out all of the details of construction of an accumulator, such devices being old and well known in the art, and no claim is herein made for an accumulator per se. To illustrate certain features of the invention, I have shown in a more or less conventional manner an individual accumulator A (Figs. I, III and XI) wherein individual items are frequently added and thereafter subtracted for the purpose of clearing the accumulator, and a grand accumulator B adaptedto indicate the grand total of all of the individual items. As will .be hereinafter described, these accumulators meshing with the total wheels 3 and adapted to be driven by a master wheel. The wheels 4 may be termed denominational wheels for they actuate the total wheels 3 of different denominations. A designates the master wheel associated with the individual accumulator, and B designates the master wheel for the grand accumulator. Both master wheels are splined to a rotary shaft 5, and when in service they travel step by step, longitudinally of the shaft 5, so as to successively mesh with the denominational wheels 4 in the accumulators. The master wheel shaft 5 is rotated through the medium of the numeral keys, as will be hereinafter described.

The master wheel carriage, or denominational carriage, comprises a bar 6 and forks 7 rigidlysecured to the ends of said bar, each fork being provided with lugs 8 .(Fig. XII) extending into an annular groove in the'hub of a master wheel. Both forks 7 are slidably mounted on a stationary guide rod 9 located above and parallel withthe master wheel shaft 5. It is tobe understood that the master wheel carriage including bar 6 and forks 7 can be shifted along the stationary guide rod 9 to locate the master wheels A and B in different positions relative to their aceumulators.

Feeding the master eo'heels.

To change the denominational. relation of the master wheels to the accumulators, each of the master wheels A and B is movable step by step along themaster wheel shaft 5, and these movements are obtained by transmitting power from the platen carriage of the typewriter to the master wheel carriage.

The master wheel carriage is provided at its lower edge with a toothed rack 10 (Figs. I, XI and XII) meshing'with a sector 11 fixed to along oscillatory shaft 20, whichextends approximately from the front to the rear of the machine- A sector 21 (Figs. I, HI and V) is rigidly secured to the rear end of the long shaft 20, and this sector 21 meshes with teeth at the lower edgeof the long feeding lever 22, said lever being detachably secured to the typewriter by means of a pivot screw 23.

F designates the platen carriage of the typewriter (Figs. I and V), said carriagebe ing adapted to travel back and forth in a straight horizontal line, and it may be actuated in response to the key operations, as is well understood in this art, the carriage mov- 1 provided with power transmission pins 25 and 25 respectively adapted to cooperate with certain elements at the upper end of the long lever 22, for the purpose of transmitting movement from the platen carriage to said long lever 22. The abutment fingers at the upper end of the lever 22 cooperate in a peculiar manner with the pins 25 and 25 as will be hereinafter described, but it should now be understood that the'long lever 22 os cillates in response to movement of the, platen carriage, and that motion is thus transmitted from the long lever 22 to the sector 21 at the rear of the machine, and thence through the long driving shaft 20 (Figs. I and V) to the sector .11 which meshes with the rack 10 on the master wheel carriage. Motion is thus housing and engagii transmitted from the traveling platen carriage to the master wheel carriage.

Manually operated means for selecting the aeourualators.

Each accumulator is pivotally supported by the pivot screws 2 (Figs. I and XI) and either accumulator can be selected and moved on its pivot to an inoperative position beyond the path of its master wheel A or B. Each accumulator is provided with a manually operated selector in the form of a lever 27 (Figs. I and XI) pivoted at 28 to the accumulator I a stationary post 29 adjacent to the housing. A spring 30 (Fig. I) connects the housing to a stationary part of the machine, and this spring tends to retain the lever 27 in engagement with the post- 29 and also in engagement with a stop pin 31 on the housing, thereby tending to retain thev accumulator inits operative position (Fig. I) wherein its wheels 4 lie at the path of a master wheel. When the upper end of one of the levers 27 isshifted to the right from the position shown in Fig. I, the lower end of said lever will cooperate with a post 29 to displace the selected accumulator from the path of its master wheel.

Transmitting movement from key l'e'vers t0 the rotary master wheel shaft.

which typewriting machines are ordinarily equipped, it being unnecessary to change the keyborad of the typewriting machine used with our calculating attachment. 43 designates a key lever extension (Fig. I) secured to the numeral key lever 42 and provided with a pin 44 through which motion is transmitted to the calculating machine. Each numeral key lever is provided with an extension 43. Vertically guided slide bars 45 (Figs. I, III, XII and XIII) are connected by means of levers 46 to the key extensions 43, each of said levers 46 (Fig.1) being pivoted to the upper end of one of the vertical slide bars '45 and provided with a hook adapted to receive the pin 44 on one of the key extensions 43. These connecting levers 46 are used to transmit power from the numeral keys to the slide bars 45, and each of said levers 46 can occupy the operative position shown by Fig. I, wherein the hook at the upper end. of the lever is engaged with pin 44 on a key exten sion, or said levers 46 can be shifted to the idle positions wherein their hooks are disengaged from pins 44, so as to allow the numeral keys to be operated without transmit ting movement to the calculating mechanism. The means for shifting the levers 46 will be hereinafter described.

Thereare ten of the vertical slide bars 45 (Fig. III) representing the digits 0 to 9, in-

elusive, and each of these slide bars, excepting the bar associated with the 0 key, is provided withineans for transmitting movement to an .oscillatory digit wheel shaft 47. 47 designates restoring springs (Figs. I, XII and XIII) tending to retain the slide bars in their elevated positions. The slide'bar 45 associated directly with the 1 l ey,will drive the digit wheel shaft 47 a distance correspondingto one step of the calculating opera tion, the slide bar 45 representing the digit '2 being adapted to drive said shaft 47 a'distance of two steps, etc., the 9 key being adapted to drive said shaft ninesteps.

To accomplish this, each of the slide bars 45 representing the digits 1 to 9, inclusive, may be provided with a predetermined number of rack teeth 45' adapted to mesh with a toothed digit wheel 48 (Figs. I, III, XII and XIII), the digit wheels being rigidly secured to the digit wheel shaft 47 and the racks being fixed to the respective slide bars. The slide bar 45 driven by the 0 key is not provided with a rack and it does not transmit movement to the digit wheel shaft 47. This particular slide bar is shown at the right hand side of Fig. I. It will now be understood that the numeral keys representing digits 1. to 9, inclusive, are used to actuate slide bars 45 whereby the digit wheel shaft 47 is actuated, and the degree ofmovement imparted to the digit wheel shaft will depend upon the value of the key from which digit wheel shaft 47, and 50 designates a gear "wheel loosely mounted on said shaft. A pawl 51, engaging the ratcheUWheel 49, is pivotally secured to the gear wheel 50. The train of gearing through which"motion is trans n'utted comprises a large gear 52 (Figs I and III) meshing with the gear wheel 50,.

a pinion 53 meshing with the large gear 52,

(Figs. III and IV), and a shiftab e gear 55.

adapted to mesh with the pinion 53 for subtraction, and also adapted to mesh with the gear 52 for addition. Thi shiftable gear 55 is splined to the master wheel shaft 5. A pawl 56 (Fig. IV) cooperates with the large gear 52 to prevent retrograde movement of the train of gearing. This train of gearing, including the ratchet andpawl 49, 51, transmits rotary movement to the master wheel shaft 5 in response to the oscillatory movestep from one accumulator wheel to another,

so as to successively actuate the different total.

The total wheel in the tens order is thus turned 2 steps, and the master wheel is then I driven by the platen carriage so as to pass to the units order. Thereiipon, the 9-key is depressed, with the result of actuatingthe total wheel in the units order, driving it nine steps. Subtraction.

55 on the master wheel shaft can mesh directly with the pinion 53 to subtract numerals from the accumulator, and said gear wheel 55 can be located in the position shown in Fig. III so as to mesh with the wheel 52.

The means for shifting the gear wheel 55 (Figs. III and IV) comprises a lever 58 pivotally supported at 59 and extending into an annular groove in the hub of said wheel 55, By operating the lever 58, the gear 55 can be placed inmesh with either the gear wheel 52 for addition or the reversing pinion 53 for subtraction.

pesconnectz'ng the numeral keys frmn the caloulatz'ng mechanism.

I have previously referred to connecting levers 46 (Fig. I) having hooks whereby the numeral keys are detachably connected to the vcalculating mechanism.

Each lever 46 has a depending leg 46 which extends between a pair of long horizontal rods 64 (Figs. I, III and XI) secured to oscillatory arms 65. These arms 65 are actuated to move the levers 46 to connect the calculating mechanism to the typewriter and to disconnect the calculating mechanism when the numeral keys are to be operated independently of the calculating mechanism. The arms 65 are fixed to an oscillatory shaft 66 provided with an operating arm 67. A spring 68 (Figs. I and XI) tends to move the arms 65 toward the front of the machine, thereby tending to connect the upper ends of levers 46 to the numeral key levers. Note that the operating arm 67 (Figs. I, III and XI) is. adaptedto engage the tdp face of an arm 69 on the long shaft 20 and that the spring 68 tends to re- The relatively wide or thick,

tain the arm 67 in engagementwith arm 69.

If the shaft 20 is turned in one direction, the arm 69 will move upwardly to impart an upward movement to the lower end of arm tated at the same time throu h the medium of shaft 5 which is driven by't e numeral keys.

However, the individual accumulator A can be actuated independently of the grand accumulator B.

Although both master wheels travel step by step at the same time to mesh with their successive denominational wheels 4, the master wheel B is relatively thin (Figs. III and XI) and it can be locatgd in successive idle potional wheels of accumulator B while the thick master wheel A meshes with corresponding denominational wheels in its accumulator A.

I will now refer to the means whereby one or both accumulators may be selected. This means includes the traveling pins 25 and 25 (Fig. V) which move with the platen carriage for the purpose of transmitting the step by step motion of the platen carriage'to the master wheel carriage. In Figs. I and V, note that both pins are carried by clips on a toothed bar 24 at the rear of the platen carriage, and that the pin 25 is alined with its supporting clip K while the pin 25 is offset relative to the clip K. When the step by step motion is transmitted through the offset pin 25, both master wheels A and B are located in successive active positions wherein they mesh with the denominational wheels 4 of their respective accumulators, as suggested by dotted lines in Fig. XI, but when the step by step motion is transmitted through the traveling pin 25, the thick master wheel A" is located in successive active positions while the thin master wheel B is located in successive idle positions between adjacent denominational wheels 4, as suggested by full lines in Fig. XI.

It will now be understood that the traveling pins 25 and 25 may be termed automatic selectors for theyautomatically select one or both accumulators, and after the selection has been made the master wheel shaft 5 is driven by the numeral keys to actuate the selected accumulator, or accumulators. A

As an illustration of one useful function resulting from this'simple means for selecting the accumulators, I will state that the accumulator A may be considered as an individual accumulator wherein individual items are added and then subtracted to clear the accumulator, while the accumulator B is used to indicate the grand total of all of the individual items.

When both master wheels mesh with their respective accumulators, the master wheel shaft 5 is rotated to simultaneously introduce the items into both accumulators. When the thin master wheel B occupies its idle positions, suggested by full lines in Fig. XI, the

master wheel shaft 5 can bereversely rotated to clear the individual accumulator A Without actuating the grand accumulator B.

To subtract the-grand total from accumu-.

Lacking the carriages and numeral keys.

I will now describe a locking device common to the numeral keys, the platen carriage and the master wheel carriage. This locking device prevents displacement of the carriages during the key operations, and it prevents operation of the keys when the master wheel carriage is not located in one of its denominational positions. designates abutment teeth (Figs. XI and XII) in the form of a straight rack carried by the master wheel carriage and adapted to cooperate with a locking. dog D. When the master wheel carriage occupies one of its denominational positions, the locking dog is alined with a space between two adjacent abutment teeth 90, and said dog can be moved into the space to lock the master wheel carriage during the calculating operation. Since themaster wheel carriage is connected to the platen carriage, it will be understood that both carriages may be locked through the medium of the locking dog D and the teeth 90. The spaces between the teeth 90 correspond to the different denominational positions of the master wheel carriage, for whenever the carriage occupies one of its denominational positions, the locking dog is in alinementwith one of the spaces.

As will be presently described, the locking dog D is actuated by all of the slide bars 45 which are driven by the numeral keys, and this locking dog is positively actuated at the beginning of the downward stroke of the key,

so if the locking dog is alined with one of the teeth 90 it cannot be elevated and as a consequence the numeral keys and their slide bars'45 cannot be depressed. The locking dog D and'teeth 90 therefore serve as means for locking the numeral keys to' prevent operation of the calculating mechanism when the master wheel carriage is not located in one of its denominational positions;

The means for transmitting motion from all of the key actuated slide bars .45 to the locking dog D comprises a series of arms 91, ,One arm for each slide bar 45. T e se eral arms 91 are fixed to a rock shaft 92, and each arm 91 is provided with a slot adapted to reqeive pin 93 on one of the side bars'45, as

I shown most clearly in Figs. XII and XIII.

" they all move at the same time, the slots in the ends-of said arms being open to permit one of the arms to'be interlocked with a pin 93 while the other arms movedownwardly independently of their pins 93. During the upward stroke of the key, the arms 91 are restored with the slide bar 45. 94 designates a supporting'plate fixed to the" rock" shaft 92,

and 95 is a pivot pin securingthe locking dog D to said supporting plate. As shown in-Fig. XII, a spring 96 yieldingly holds the locking dog D in engagement with a stop pin97 on-thesupporting plate 94. During the downward stroke of a key, the arms 91, suv porting plate 94 andlocking dog D move fr m the positions shown in Fig. XII to the positions shown in Fig. III, so as to lock the master wheel carriage during the calculating operations.

Upon the completion of v the downward stroke of a key, the master wheel carriage should be unlocked and permitted to advance one step while the key is returning to its elevated position. As shown in Fig. XII, the locking dog Dis provided with an edge 98 which normally lies adjacent to the row of teeth'90 so as to enter the space between two teeth at the begi'nnin g of the downward stroke of a key. The locking dog is also provided with an extension 99. located below the bar on which the teeth 90 are formed and adapted to engage the bottom face of said bar 100 designates an unlocking dog, or releasing dog,

I pivoted at 101'to the supporting plate 94 and provided with a shoulder 102 adapted to engage the locking dog D. The unlocking dog 100is also provided with an extension 108 adapted to engage a stationary abutment pin 104. As shown by Figs. XII and XIII, a

' spring l05tends to move the unlocking dog 100 toward the locking dog D. Fig. XII illustrates the positionsof the locking elements when all of the keys are elevatedand Fig.

continues, the locking dog extension 99 engages the bottom of the bar on which teeth 90 are formed and the spring 96 then yields to retain the extension 99 in engagementwith said bar while the supporting plate 94 continues in motion with the shaft 92. At the same time, the unlocking dog 100 passes away from the abutment 104 and the dogs 'D and 100 finally occupy the positions shown by Fig. XIII at the completion of the downward stroke of the key. In Fig. XIII, note that the locking dog D has an extension which lies immediately behind the shoulder 102 when the key occupies its lowermost position. Therefore, at the beginning of the upward stroke of the key, the locking dog D will engage the shoulder 102 and quickly pass from the teeth 90, so as to unlock the master wheel carriage at the beginning ofthe upward stroke. Immediately before the key reaches its elevated position, the extension 103 on unlocking dog 100 will strike the abutment 104 so as to release the shoulder 102 from the locking dog D, thereby permitting the spring 96 to restore the locking dog to the position shown'in Fig. XII. The function of the unlocking dog 100 is to quickly release the locking d.og,D from the teeth 90 at the beginning of the upward stroke of a key, thereby permitting the carriages to travel while the key is returning'to its elevated position. It will now be understood that the locking dog D enters between two teeth 90 at the beginning of a downward stroke of a key, and that this dogis released from the teeth immediately after the downward. stroke is completed. a

I will now refer to the means for locking the numeral keys to prevent operation thereof when the master wheel carriage is not located in one of itsdenominational positions. 106 designates a stop dog (Figs. XII and XIII) in the form of a bell crank lever having an upper armada ted to engage the locking dog D and the low r arm adapted to engage'a stationary abutment pin 107. This stop dog 106 is carried by the oscillatory supporting plate 94 and it is pivotally mounted on the pin 101. It is also connected to the supporting plate through the medium of a spring 108. As previously stated, when a key is depressed, the elements of the locking device move from the positions shown in Fig. XII to the positions shown in Fig. XIII. However, the stop'dog 106 cooperates with the ockingdog D to prevent downwardmotion of akey when the master wheel carriage is not in one of its denominational positions. 'When the master wheel carriage is properly located in one of its denominational positions, the locking dog D is alined with a space between two of the teeth 90, and when said carriage is in any other position the locking dog lies below a tooth 90 or below a solid part of the bar on which the teeth 90 are formed. Assuming that the master wheelcarriage lies in Illuan intermediate position, between two of its denominational positions, if a key is depressed the locking dog D and stop dog 106 will be positively driven by the key, and at the beginning of such motion the locking dog will strike a tooth 90 and the stop dog 106 will strike the locking dog so as to positively preyent-a continued downward motion of the icy. .1 v

During the ordinary key operations, the edge 08 on the locking dog D (Figs. XII and XIII) passes between two teeth 90, and at the same time the stop dog 106 engages the abutment 107 so as to. turn on its pivot 101, thereby displacing the stop dog from the locking dog D after the latter has been elevated to interlock with the teeth 90.

From the foregoing, it will be understood that the locking dog D is adapted to cooperate with a tooth 90 and also witha stop dog 106 to prevent downward motion of a key when the master wheel carriage lies between two of its denominational positions. IVhen the master wheel carriage occupies its starting .position, or home position, the locking dog D is located at one side of the teeth 90, as shown in Fig. III, whereit lies below the' bottom face of the bar on which the teeth 90 are formed. If a key is depressed while the locking dog occupies this position, said dog will engage the bottom face of the bar to stop the key at the beginning of its downward movement. The locking dog is also adapted to cooperatewith a relatively widetooth 90 shown in Figs. III and XI. This wide tooth corresponds to decimal point spaces 90" in the accumulators. IVhen the master wheels are positioned at the decimal point spaces 90, one of the typewriter keys should be depressed while the master wheels are located at the decimal spaces, the locking dog D will engage the wide tooth 90 so as to stopthe numeral key at the beginningof itsdownward stroke.

Looking and alz'm'ng the master wheels.

to the master wheel carriage and engaged with a pin 112 which extends from an operating lever 113, the latter being pivoted at .111 to the inastcr wheel carriage. The locking dog 110,

. is also yieldingly connected to the carriage through the medium of a spring 115 WlllCh tends to retain said locking dog in'engagement with the master wheel. Fig. I shows the positions of these parts when the lock ng "dog 110 occupies its operative positiom-and Fig II shows the parts as theyappear when thelocking dog is withdrawn from the masher 119 shown in Figs. XIV and XV. The

long bar 117 can be tilted about the axis of its trunnions 118 for the purpose of elevating the forward ends of the levers 113 (Figs. II and III) thereby transmitting motion from the pins 112 on said levers to the locking dogs 110 so as to withdraw the locking dogs from the master wheels.

Through the medium of mechanism to be hereafter described, the bar 117 is tilted to the position shown in Fig. II at the beginning of each key operation, so as to unlock the master wheels before the master wheel shaft 5 is driven by the keys, and after the downward stroke of the key has been completed, the bar 117 is released and restored to permit the finger 120. When the arm 121 is shifted from the position shown by Fig. XIV to the position shown in Fig. XV, the pin 123 will engage the finger 120 so as-to tilt the bar 117 which unlocks the dog 110, aspreviously pointed out. The arm 121 XIVand XV) fixed to the rock shaft. 92 and provided with a cam finger 125 adapted to engage a camfinger 1260n the arm 121'. These cam fingers 125 and 126 are shown 'in Figs.

III, XIV, XV and XVI, each finger having inclined upper and lower edges adapted to ,cooperate with the other finger.

I I have previously described the means whereby the rock shaft 92 is oscillated in response to each key operation, and it is to be understood that the arm 12% moves with the shaft 92. At the beginning of the downward stroke of the key. the cam finger 125 moves upwardly from the position shown in Fig. XIV so as to cooperate with the inclined lower edge of cam finger 126 whereby the arm 121 is shifted to the right fron the position shown in F XIV to elevate the bar 117. As the key continues its downward motion, the arm 124 and its cam 125 moves upwardly, as suggested by Fig. XV. Upon the completion of the downward stroke of the key, the cam finger 125 passes from the'upper edge of cam finger 126, and the bar 117 is then restored to the position is actuated through'the medium of an arm 124 (Figs. III,

mamas I shown in Fig. XIV. During the upward stroke of the Key, the arm 124 moves downwardly, and the inclined lower edge of cam 1 25 engages the inclined upper edge of cam 126, with the result of idly moving the arm 121 while the cam 125 is moving downwardly to the position shown in Fig. XIV. 129 designates a spring (Figs. XIV and XV) whereby the arm-121 is yieldinglyconnected to an extension on the bar 117, and 130 designates a spring connecting said extension to a stationary part of the machine. The spring 130 serves as means for restoring the bar 117 to the position shown -in Fig. XIV, and the spring 129 serves as means for restoring the arm 121 after it has been idly shifted to the left from the positions shown in Fig. XIV and XV during the downward motion of cam 125.

From the foregoing it will be understood that the bar 117 is elevated about the axis of its trunnions 118 at the beginning of each key operation so as to move the locking dog 110 from the operative positions shown in Fig. I to the inoperative position shown in Fig. II, and when the downward stroke of the key is completed, the bar 117 is released and restored throu h the medium of the spring 130 shown in igs. XIV and XV.

131 designates a restoring spring (Figs. XIV and XV) connecting the arm 124 to a stationary part of the machine and tending to retain said-arm in engagement with a stationary stop pin 132. The arm 124 is con nected to the rock shaft 92 on which the arms 91 are mounted, so the spring 131 yieldingly holds said arms in their elevated shown by Fig. XII.

Stopping and locking the integer wheel shaft.

The integer wheel shaft 47 is oscillated through the medium of the keys, as previously ointed out, and when this shaft is restored to its starting position it should be-spositively held there. It is also desirable to prevent rebound of the integer wheel shaft when it is restored to its starting position. As shown by Figs. III, XIV and XV, a stop member 133 is fixed to the oscillatory integer wheel shaft, and when this shaft occupies its start ing position, or home position, the stop member 133 engages a stationary stop pin 134. 135' designates a stop dog pivoted at 136 and adapted to engage a. shoulder 137 on the stop member 133, so as to-lock the integer wheel shaft in its starting position. A spring'138 (Figs. XIV and XV) tends to retain the stop dog 135 in engagement with the shoulder 137. The means for unlocking the dog 135 comprisesan arm 139 (Figs. XIV and XV) pivoted at 140 and provided with a pin 141 adapted to engage the stop dog 135. I A link 142 connects the arm 139 to the arm 121 which is driven bythe; key actuated arm 124, as

previously poiifise'd out.

positions 137. The stopdog is thus unlocked at the beginning-of each key operation so as to permit operation of the integer wheel shaft 47. During the downward stroke of the key, the stop member 133 and stop dog 135 are shifted to the positions shown by Fig. XV, and during the upward stroke, the stop member 133 moving with the integer wheel shaft 47, is restored to the position shown by Fig. XIV. Immediately before the stop member 133 reaches the positions shown in Fig. XIV, the spring 138 cooperates with the locking dog 135 to impart a final impulse to the integer wheel shaft whereby it is positively restored to the predetermined starting position, and when the stop member 133 engages the stationary stop member 134, the dog 135 cooperateswith shoulder 137 to positively prevent rebound of the shaft 47. i

a I claim: 4

1. The combination of a typewriter having a platen carriage, a calculating mechanism comprising an accumulator provided with an actuatorand a traveling denominational carriage movable step by stepto change the denominational relation of the actuator to the accumulator, and feeding devices whereby motion is transmitted from said platen carriage to said denominational carriage, said feeding devices comprising av traveling power transmission member carried by said platen carriage, a driven member through which motion is transmitted to said denominational carriage, a pair of abutment fingers pivoted to one of said members and extended into the path of the other member to provide for the transmission of movement to said driven member, and automatic means whereby both of said pivoted abutment fingers are deflected laterally to prevent the transmission of movement to said driven member.

2. The combination of a typewriter having a platen carriage, and calculating mechanism comprising an accumulator provided with an actuator and a traveling denominational carriage movable step by step to change the denominational relation of the actuator to the accumulator, and feeding devices whereby motion is transmitted from (said platen carriage to said denominational carriage, said feeding devices comprising a traveling power transmission member carried by said platen carriage, a, driven member through which motion is transmitted to said denominational carriage, a pair of abutment fingers pivoted to one of said members and extending into the actuator and a traveling denominational carriage movable step by step to change the denominational relation of the actuator to the accumulator, and feeding devices whereby motion'is transmitted from said platen carriage to said denominational carriage, said feeding devicescomprising a travelin power transmission member carried by sai platen carriage, a driven member through which motion is transmitted to said denominational carriage, a pair of parallel abutment fingers pivoted to said driven member and extending into the path of said traveling member to provide for the transmission of movement to said driven member, both of saidpivoted abutment fingers being movable laterally to positions beyond the path of said traveling power. transmission member, one of said fingers having a cam face cooperable with said power transmission member to avoid the transmission of'movement when the platen carriage travels in one direction, and a pair of stationary cams cooperable with said abutment fingers to displace them'from the path of'said traveling member. I

4. In a calculating machine, an accumulator provided with an actuator, asecond accumulator provided with a second actuator,,a denominational carriage supporting both of said actuators and movable step by step to simultaneously change the denominational relation of the actuators to the respective accumulators, means whereby both actuators are driven at the same time to actuate the first-mentioned accumulator independently of the second accumulator, the first-mentioned actuator being thicker than the second-mentioned actuator whereby it remains constantly in operative relationship with its accumulator while the thinner second actuator occupies successive inoperative positions relative to said second accumulator, and

a selector whereby said second actuator is located in successive operative positions relative to said second accumulator while the first actuator remains in successive operative positions relative to the first accumulator.

5. In a calculating machine, an accumulator provided with a succession of toothed denominational wheels and a rotary master wheel provided with teeth adapted to mesh with said wheels, a second accumulatorprovided with a succession of toothed denominational wheels spaced from each other and a second rotary master wheel having teeth adapted to move in the spaces between the last-mentioned wheels, the first-mentioned tioned master Wheel is caused to mesh with successive denominational wheels'of 1ts accumulator while said second master wheel is located at the spaces between'successive denominational wheels of said second accumulator, each of said spaces being wider than the teeth of said second master wheel to permit ineffective rotation of said second master wheel, key-controlled means wherebyv both master wheels are driven at the same time to actuate the succession of denominational wlieels of the first-mentioned accumulator while said second master wheel lies at the spaces between denominational wheels'of said second accumulator, and a selector cooperable with the first mentioned master wheel to establish an operative relationship between said second master wheel and the denominational 'wheels of said second accumulator while said first-mentioned master wheel is in mesh with the denominational wheels of its accumulator.

6. In a calculating machine, an accumulator provided with a succession of toothed dcnominational wheels and a rotary master wheel having teeth adapted to mesh with said wheels, a second accumulator provided with a second toothed rotary master wheel and a succession of toothed denominational wheels separated from each other to provide spaces for the toothed portion of said second master wheel, the first-mentioned master wheel being thicker than the secondmentioned master wheel so that it remains constantly in mesh with the denominational wheels of its accumulator wliilethe secondmentioned master wheel is located in idle positions between denominational wheels of said second accumulator, a denominational carriage supporting both of said master wheels and movable step by step to simultaneously change the denominational relation of said master wheels to their accumulators, a key-controlled traveling feeder whereby said carriage isshifted, said feeder being provided with a selector whereby the first-mentioned master wheel is caused to mesh with successive denominational wheels of its accumulator while said second master wheel lies at the successive spaces between denominational wheels of the second accumulator, ke -controlled means whereby said master w eels are simultaneously rotated to actuate the first-mentioned accumulator independentlyof said second accumulator and a second selector comprising ashifter associated with said traveling feeder to locate said second master wheel in operative positions relative to the-denominational wheels of said second accumulator, each of said selectors being adapted to control the relation of both master'wheels to their respective accumulators, and said master wheels being so spaced from each other that the first-mentioned thick master wheelmay mesh with its denominational wheels while said'second master wheel lies at said spaces, and also when said second master wheel is in mesh with its denominational wheels.

7. The combination of a typewriter having a platen carriage and calculatingmechanism comprising two accumulators each provided with an actuator, a traveling denominational carriage supporting both of said ac- .tuators and movable step by step to simultaneousl change the denominational relation of 0th actuators to the respective accumulators, operating means whereby motion is transmitted from said platen carriage to saiddenominational carriage, one of said actuators being thicker than the other actuator whereby it remains constantly in operative relationship .with its accumulator while the thinner actuator occupies succes- -sive inoperative positions relative toits accumulator, said operating means being proactuators are supported and movable step by step to simultaneously change the denominational relation of both actuators to the respective accumulators, a traveling selector carried by said platen carriage, one of said actuators bein thicker than the other actuator whereby it. remains constantly in operative relationship with its accumulator while the thinner actuator occupies successive inoperative positions relative to its accumulator, operating means through which movement is transmitted from said traveling selector to said denominational carriage to locate said thicker actuator in successive operative positions while the other actuator is located in successive inoperative positions,

and a second traveling selector carried by said platen carriage to locate both of said actuators in successive operative positions.

9. In a calculating machine, an accumulator provided with a succession of toothed denominational wheels and an actuator adapted'to mesh with said wheels, a second accumulator provided with a succession of toothed denominational wheels spaced from each other and a second actuator adapted to move in the spaces between the last-mentioned wheels, the first-mentioned actuator being thicker than the second-mentioned actuator whereby it remains constantly inv mesh with the denominational wheels of its accumulator while the thinner second actuator occupies successive inoperative positions in the s aces between the denominational wheels 0 its accumulator, means for simultaneously shifting both of said actuators step by step to locate said second actuator at the spaces between its toothed denominational wheels while the first-mentional actuator is caused to mesh with successive denominational wheels of its accumulator, means whereby both actuators are rotated at the same time to actuate the first-mentioned accumulator while the second actuator occu pies inoperative positions at the spacesbetween the denominational wheels of the second accumulator, and a selector cooperable with the first-mentioned means to locate said actuator in operative positions relative to its accumulator while the first-mentioned actuator remains in meshwith the denominational wheels of the. first-mentioned accumulator, said selector comprising a traveling operating member through which step by step motion is transmittedto both of said actuators.

10. In a calculating machine, an accumulator provided with a succession of toothed denominational Wheels and arotary master wheel having teeth adapted to mesh with said wheels, a secondaccumulator provided with a second toothed master wheel and a succession of toothed denominational wheels sepa rated from each other to provide spaces for the toothed portion of said second master wheel, the first-mentioned master wheel being thicker than the second-mentioned master wheel whereby it remains'constantly in mesh with the denominational wheels of the first mentioned accumulator while the thinner second actuator occupies successive inoperative positions at the spaces between the denominational wheels of the second accumua lator, a denominational carriage by which both of said master wheels are supported and movable step by step to simultaneously change the denominational relation of said master'wheels to their accumulators, a keycontrolled traveling feeder whereby said car riage is shifted step by step to move the first- .mentioned master wheel from one of its denominational wheels to another while said Wheel in operative positionsto its denominasecond master wheel is moved from one of tional wheels while the first-mentioned mas- 0 said spaces to another, key-controlled means ter wheel remains in mesh with the denomiwhereby said master wheels are simultanenational wheels of the first-mentioned acously rotated to actuate the first-mentioned cumulator. accumulator independently of saidsecond ac- In testimony that I claim the foregoing I cumulator, and a selector associated with said hereunto aflix my signature. traveling feeder .to locate said second master s EDWARD 0.. SCHINKE. 

